体细胞突变是柑橘等果树比较常见的生物学现象，也是品种选育，即芽变选种的主要变异来源。
Somatic mutation, a main biological phenomenon of citrus and other fruits, is often used for breeding as a major variation source. Spontaneous mutations often occur in citrus.
本文对原发性进行性失语（PPA）进行了分类，而且还介绍了其3种主要变异，旨在增强病例报告的统一性并提高研究结果的可靠性。
This article provides a classification of primary progressive aphasia (PPA) and its 3 main variants to improve the uniformity of case reporting and the reliability of research results.
咳嗽变异性哮喘属于哮喘的一种，其主要症状是干咳。
Cough-variant asthma is a type of asthma in which the main symptom is a dry, non-productive cough.
它模拟达尔文的自然选择，还有变异，把“适应性”(正如适用于个体的公式所决定的那样)作为主要因素选择生存繁衍和变异的个体。
It mimics Darwinian natural selection, making "fitness" (as determined by a formula applied to an individual) the chief selector of individuals for survival and procreation, together with mutation.
主要循环运行在100和5000年期间伴随着基于次要循环基础上的变异。
The major cycles run in 100 and 5000 years with variations based on minor cycles.
格里姆对历史语言学的主要贡献是，他从音变-一系列音位有系统的变异-的角度解释了同源词之间的关系。
Grimm's major contribution to historical linguistics is his explanation of the relationships among cognates in terms of a sound shift, the systematic modification of a series of phonemes.
IHA为主要类型，发病与异常的促醛固酮分泌因子的增加及基因变异有关。
The etiology of IHA, the main subtype, is related with increased abnormal aldosterone excreted factor and genovariation.
影响这种变异的主要是温度和湿度。
The variation is affected mainly by temperature and humidity.
其主要算子包括：编码方式、选择算子、交叉算子、变异算子及采用精英保留策略。
Its main operators include coding way, selecting operator, cross operator, mutation operator and adopting elites to keep the tactics.
结论：抗菌药的用药频度，即抗菌药应用的选择性压力，是影响细菌耐药性变异最主要的因素之一。
Conclusion; the DDDs, that is the selective pressure of the antibacterial usage, is one of the main influencing factors of the variation of drug resistance.
算法的主要操作算子包括超变异、正选择、记忆细胞产生和抗体相似性抑制。
The main operators of the algorithm included hyper mutation, positive selection to produce memory cells and similar cell suppression.
结果表明，森林土壤水分的变异主要来源于林地土壤条件的变化及树冠对降雨的不均匀截留，且随季节而变化。
The results showed that the variation of forest soil water was caused mainly by variations of forest soil conditions and uneven interception of rainfall by tree crowns that, varies with seasons.
导入后代植株形态性状上的变异主要表现为籽粒颜色特殊，部分株系植株较高、叶片肥大、茎杆粗壮；
The main variations of offspring in the plant morphologic characters were special seed-color, tall plant height, fat leaves and thick stalk.
内应力是造成高铬白口铸铁磨球在生产和服役过程中出现变异和失效的主要原因。
Variation and failure of the grinding ball of high chromium white cast iron during production and service are mainly caused by the internal stress.
分布在高速区的地震，主要活动在高速区内的速度变异地带。
The earthquakes in high velocity area were mainly occurred in variation belt.
对52个烤烟基因型主要挥发性香气物质含量的变异进行了研究。
The variation of the contents of main volatile aroma components in 52 flue-cured tobacco genotypes was studied.
算法的主要步骤有超变异、选择、记忆和相似性抑制。
The main steps of the algorithm include hyper-mutation, selection, memory and similarity suppression.
变异的主要原因是DNA发生改变。
研究了几个主要性状的遗传变异和选择潜力，探讨了性状再选择的可能性。
Genetic variation and genetic gains of several principal characters of two strains were estimated, then the possibility of re-selection was discussed.
以露地栽培的82份草莓品种(系)为材料，对其主要数量性状的变异、分布规律及相关性进行了研究和分析。
Variation condition, distribution rule and correlation of main quantitative character of 82 open ground strawberry varieties (or lines) were studied and analyzed.
导致自闭症的主要原因尚未确定，研究发现自闭症病例与100种基因变异有关，其中一些可以遗传，一些则是自然发生。
The overarching cause of autism is still unknown, and cases have been linked to about 100 mutations, some inherited and some developing spontaneously.
算法主要包括超变异、正选择、记忆抗体产生、优育抗体产生、细胞相似抑制、整理算子。
The main operators of the algorithm included hyper-mutation, positive selection to produce memory cells and excellent sub-population, similar cell suppression, reorganization operator.
本文主要根据生物学的复制和变异的基本原理，提出了具有反偏爱复制特性的一个蛋白质作用网络的新的演化模型。
In this paper, we mainly propose a new evolving protein interaction network model charactered by anti-preference based on the basic principles of biological duplication and divergence.
主要观察指标：期间和期间内的变异系数、组内相关系数、测试间变异性和测试-再测试结果的变异性。
MAIN OUTCOME MEASURES: Intrasession and intersession coefficient of variation, intraclass correlation coefficient, intratest variability, and test-retest variability.
比较文学变异学的主要研究方法有语言层面的变异研究，接受层面的变异研究和形象层面的变异研究。
Major research methods of variations studies in comparative literature include studies of variations in language, in reception and in images.
但现今土壤空间变异规律的研究主要集中在土壤物理性质方面，而土壤化学性质方面的研究还较少。
However, the present study on the rules of the soil space variation concentrates more on its physical aspects than its chemical attributes.
结果表明：宽鳍鳃的形态变异主要表现在躯体纵轴及头部特征上。
The morphological variations on the head were stronger than that on the the longitudinal axial.
结果表明：宽鳍鳃的形态变异主要表现在躯体纵轴及头部特征上。
The morphological variations on the head were stronger than that on the the longitudinal axial.
应用推荐